FedEx fills Santa's sleigh during busiest day in its history

FedEx Corp.'s sorting facility at Los Angeles International Airport is a maze of chutes, ladders and catwalks, capable of processing more than 300 packages a minute.

And in the pre-dawn hours Monday — which FedEx projected would be the busiest in its history — it was going full force.

By Monday afternoon, FedEx estimated that it had shipped 19 million packages, a 10% increase from its busiest day last year. The company predicted that it will deliver a record 280 million parcels worldwide between Thanksgiving and Christmas, assisted by 20,000 seasonal hires.